Hello,

The chapters in Physics that have a greater weightage are Heat & Thermodynamics, Ray Optics, Electromagnetic Waves, Semiconductors, Error &Instrument analysis, Gravitation, Wave Optics, Photoelectric Effect, Oscillations, Electromagnetic Induction & Alternating Current, Rotation, Kinematics, Electrostatics, Current Electricity &Capacitors, Properties of Matter, Magnetic Effects of current &Magnetism, Bohr's Atomic Model , Waves and Sound.

The best to prepare for an exam is by solving the previous question papers.Make sure that you know the concepts clearly.Solve numerical problems and study the important formulas.

You can know more about the syllabus and exam pattern in the link below :

https://engineering.careers360.com/articles/jee-main-physics-syllabus